Panasonic MEW01349 Operating Instructions Manual page 158

Panasonic Electric Works Nordic AB
MEW01349 Rev: - Operating Instructions Fire alarm system EBL512 G3, V1.1.x
Exhausts
Exhausts from cars / trucks, lift trucks, lawn mowers, etc. influences
smoke detectors (sensors). If windows and doors are open, exhausts
can "slip in" that way.
Lack of maintenance
Smoke detectors (sensors) are influenced by their environment and
become "dirty". In an analog system (like EBL512 G3) a Service
signal is given when it is time to exchange the smoke detectors
(sensors) to new ones. The alternative is to exchange detectors at
given periods, to be on the safe side.
Change in activities or wrong choice of detector
If the activities in the premises are altered, the detector choice might
also need to be altered. Due to special environments, see above, an in-
appropriate detector type might have been chosen from the beginning
and thus cause unnecessary alarms.
Miscellaneous
Choosing another type of detector can solve certain problems. Bear
also in mind, that the coverage area can be different for different types
of detectors.
It is however not always the best action to change detector type. Here
is a list of other actions, programmed via WinG3, which can be used:

Another alarm algorithm can be used (e.g. during working
hours).

Alarm delay for smoke detectors / sensors can be used.

Two-zone or two-unit dependent (co-incidence) fire alarm
activation can be used.

In an installation with addressable detectors / sensors (e.g.
EBL512 G3), the affected detectors can be individually
disabled (or whole zones) for temporary work in the
premises. Bear in mind that the smoke spreads, and
consideration must be taken to adjacent detectors / zones.
Disablements can be done automatically via a time channel
(built-in or external) or via menu (H2/B1-B2). Automatic
re-enabling can be used.

If there is an alarm organisation for the personnel on site,
the alert annunciation function can be used.

Pre-warning can be used as information before a fire alarm
is activated.
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